Kernel driver `w83781d.o'
=========================

Status: W83781D support is complete and well-tested.
        W83782D support is complete and well-tested.
        W83783S support is complete but has not been well-tested.
        W83791D support is BETA.
        W83627HF support is complete but has not been well-tested.
        AS99127F support is BETA and has known problems due to lack of a
		 chip datasheet. SEE BELOW.

Supported chips:
  * Winbond W83781D
    Prefix: 'w83781d'
    Addresses scanned: I2C 0x20 - 0x2f, ISA 0x290 (8 I/O ports)
    Datasheet: http://www.winbond-usa.com/products/winbond_products/pdfs/PCIC/w83781d.pdf
  * Winbond W83782D
    Prefix: 'w83782d'
    Addresses scanned: I2C 0x20 - 0x2f, ISA 0x290 (8 I/O ports)
    Datasheet: http://www.winbond.com/PDF/sheet/w83782d.pdf
  * Winbond W83783S
    Prefix: 'w83783s'
    Addresses scanned: I2C 0x2d
    Datasheet: http://www.winbond-usa.com/products/winbond_products/pdfs/PCIC/w83783s.pdf
  * Winbond W83791D
    Prefix: 'w83791d'
    Addresses scanned: I2C 0x2c - 0x2f
    Datasheet: http://www.winbond-usa.com/products/winbond_products/pdfs/PCIC/w83791d.pdf
  * Winbond W83627HF
    Prefix: 'w83627hf'
    Addresses scanned: I2C 0x20 - 0x2f, ISA 0x290 (8 I/O ports)
    Datasheet: http://www.winbond.com/PDF/sheet/w83627hf.pdf
  * Asus AS99127F
    Prefix: 'as99127f'
    Addresses scanned: I2C 0x28 - 0x2f
    Datasheet: Unavailable from Asus



Authors: Frodo Looijaard <frodol@dds.nl>, Philip Edelbrock <phil@netroedge.com>,
         and Mark Studebaker <mdsxyz123@yahoo.com>


Module Parameters
-----------------

* force: short array (min = 1, max = 48)
  List of adapter,address pairs to boldly assume to be present
* force_w83781d: short array (min = 1, max = 48)
  List of adapter,address pairs which are unquestionably assumed to contain
  a `w83781d' chip
* force_w83782d:
  Ditto
* force_w83783s:
  Ditto
* force_w83791d:
  Ditto
* force_w83627hf:
  Ditto
* force_as99127f:
  Ditto
* force_subclients=bus,caddr,saddr,saddr
  This is used to force the i2c addresses for subclients of
  a certain chip. Typical usage is `force_subclients=0,0x2d,0x4a,0x4b'
  to force the subclients of chip 0x2d on bus 0 to i2c addresses
  0x4a and 0x4b.
  This parameter is useful for certain Tyan boards.
* ignore: short array (min = 1, max = 48)
  List of adapter,address pairs not to scan
* ignore_range: short array (min = 1, max = 48)
  List of adapter,start-addr,end-addr triples not to scan
* probe: short array (min = 1, max = 48)
  List of adapter,address pairs to scan additionally
* probe_range: short array (min = 1, max = 48)
  List of adapter,start-addr,end-addr triples to scan additionally
* init=[0,1] (default 1)
  Use 'init=0' to bypass initializing the chip.
  Try this if your computer crashes when you load the module.


Description
-----------

This driver implements support for the Winbond W83781D, W83782D,
W83783S, W83791D, W83627HF and W83698HF chips, and the Asus AS99127F chips.
We will refer to them collectively as W8378* chips.

There is quite some difference between these chips, but they are similar
enough that it was sensible to put them together in one driver. 
The W83627HF chip is assumed to be identical to the ISA W83782D.
The Asus chips are similar to an I2C-only W83782D.

Detection of these chips can sometimes be foiled because they can be in
an internal state that allows no clean access. If you know the address
of the chip, use a 'force' parameter; this will put them into a more
well-behaved state first.

The W8378* implements temperature sensors (three on the W83781D and W83782D,
two on the W83783S), three fan rotation speed sensors, voltage sensors
(seven on the W83781D, nine on the W83782D and six on the W83783S), VID
lines, alarms with beep warnings, and some miscellaneous stuff.

Temperatures are measured in degrees Celsius. There is always one main
temperature sensor, and one (W83783S) or two (W83781D and W83782D) other
sensors.  An alarm is triggered for the main sensor once when the 
Overtemperature Shutdown limit is crossed; it is triggered again as soon as 
it drops below the Hysteresis value. A more useful behaviour 
can be found by setting the Hysteresis value to +127 degrees Celsius; in 
this case, alarms are issued during all the time when the actual temperature
is above the Overtemperature Shutdown value. The driver sets the
hysteresis value for temp1 to 127 at initialization.

For the other temperature sensor(s), an
alarm is triggered when the temperature gets higher then the Overtemperature 
Shutdown value; it stays on until the temperature falls below the Hysteresis 
value. But on the W83781D, there is only one alarm that functions for both 
other sensors!  Temperatures are guaranteed within a range of -55 to +125 
degrees. The main temperature sensors has a resolution of 1 degree; the other 
sensor(s) of 0.5 degree.

Fan rotation speeds are reported in RPM (rotations per minute). An alarm is
triggered if the rotation speed has dropped below a programmable limit. Fan 
readings can be divided by a programmable divider (1, 2, 4 or 8 for the
W83781D; 1, 2, 4, 8, 16, 32, 64 or 128 for the others) to give
the readings more range or accuracy. Not all RPM values can accurately be
represented, so some rounding is done. With a divider of 2, the lowest
representable value is around 2600 RPM.

Voltage sensors (also known as IN sensors) report their values in volts.
An alarm is triggered if the voltage has crossed a programmable minimum 
or maximum limit. Note that minimum in this case always means 'closest to
zero'; this is important for negative voltage measurements. All voltage
inputs can measure voltages between 0 and 4.08 volts, with a resolution
of 0.016 volt.

The VID lines encode the core voltage value: the voltage level your processor 
should work with. This is hardcoded by the mainboard and/or processor itself.
It is a value in volts. When it is unconnected, you will often find the
value 3.50 V here.

The W83782D and W83783S temperature conversion machine understands about
several kinds of temperature probes. You can program the so-called
beta value in the sensor files. '1' is the PII/Celeron diode, '2' is the
TN3904 transistor, and 3435 the default thermistor value. Other values
are (not yet) supported. You can program your own values through the
rt interface, but this is not very useful, because these tables are
under NDA.

In addition to the alarms described above, there is a CHAS alarm on the
chips which triggers if your computer case is open.

When an alarm goes off, you can be warned by a beeping signal through
your computer speaker. It is possible to enable all beeping globally,
or only the beeping for some alarms.

Individual alarm and beep bits:

0x000001: in0
0x000002: in1
0x000004: in2
0x000008: in3
0x000010: temp1
0x000020: temp2 (+temp3 on W83781D)
0x000040: fan1
0x000080: fan2
0x000100: in4
0x000200: in5
0x000400: in6
0x000800: fan3
0x001000: chassis
0x002000: temp3 (W83782D and W83627HF only)
0x010000: in7 (W83782D and W83627HF only)
0x020000: in8 (W83782D and W83627HF only)

If an alarm triggers, it will remain triggered until the hardware register
is read at least once. This means that the cause for the alarm may 
already have disappeared!  Note that in the current implementation, all
hardware registers are read whenever any data is read (unless it is less
than 1.5 seconds since the last update). This means that you can easily
miss once-only alarms.

The chips only update values each 1.5 seconds; reading them more often
will do no harm, but will return 'old' values.


AS99127F PROBLEMS
-----------------
The as99127f support was developed without the benefit of a datasheet.
In most cases it is treated as a w83781d (although revision 2 of the
AS9917F looks more like a w83782d).
This support will be BETA until a datasheet is released.
One user has reported problems with fans stopping
occasionally.

Note that the individual beep bits are inverted from the other chips.
The driver now takes care of this so that user-space applications
don't have to know about it.

Known problems:
	- Problems with diode/thermistor settings (supported?)
	- One user reports fans stopping under high server load.
	- Revision 2 seems to have 2 PWM registers but we don't know
	  how to handle them. More details below.

These will not be fixed unless we get a datasheet.
If you have problems, please lobby Asus to release a datasheet.
Unfortunately several others have without success.
Please do not send mail to us asking for better as99127f support.
We have done the best we can without a datasheet.
Please do not send mail to the author or the sensors group asking for
a datasheet or ideas on how to convince Asus. We can't help.


Chip Features
-------------

Chip `w83781d'
             LABEL        LABEL CLASS      COMPUTE CLASS ACCESS MAGNITUDE
               in0               NONE               NONE     R     2
               in1               NONE               NONE     R     2
               in2               NONE               NONE     R     2
               in3               NONE               NONE     R     2
               in4               NONE               NONE     R     2
               in5               NONE               NONE     R     2
               in6               NONE               NONE     R     2
           in0_min                in0                in0     RW    2
           in1_min                in1                in1     RW    2
           in2_min                in2                in2     RW    2
           in3_min                in3                in3     RW    2
           in4_min                in4                in4     RW    2
           in5_min                in5                in5     RW    2
           in6_min                in6                in6     RW    2
           in0_max                in0                in0     RW    2
           in1_max                in1                in1     RW    2
           in2_max                in2                in2     RW    2
           in3_max                in3                in3     RW    2
           in4_max                in4                in4     RW    2
           in5_max                in5                in5     RW    2
           in6_max                in6                in6     RW    2
              fan1               NONE               NONE     R     0
              fan2               NONE               NONE     R     0
              fan3               NONE               NONE     R     0
          fan1_min               fan1               NONE     RW    0
          fan2_min               fan2               NONE     RW    0
          fan3_min               fan3               NONE     RW    0
             temp1               NONE               NONE     R     1
        temp1_hyst              temp1              temp1     RW    1
        temp1_over              temp1              temp1     RW    1
             temp2               NONE               NONE     R     1
        temp2_hyst              temp2              temp2     RW    1
        temp2_over              temp2              temp2     RW    1
             temp3               NONE               NONE     R     1
        temp3_hyst              temp3              temp3     RW    1
        temp3_over              temp3              temp3     RW    1
               vid               NONE               NONE     R     2
          fan1_div               fan1               NONE     RW    0
          fan2_div               fan2               NONE     RW    0
          fan3_div               fan3               NONE     R     0
            alarms               NONE               NONE     R     0
       beep_enable             alarms               NONE     RW    0
             beeps             alarms             alarms     RW    0

             LABEL                          FEATURE SYMBOL        SYSCTL FILE:NR
               in0                     SENSORS_W83781D_IN0                in0:3
               in1                     SENSORS_W83781D_IN1                in1:3
               in2                     SENSORS_W83781D_IN2                in2:3
               in3                     SENSORS_W83781D_IN3                in3:3
               in4                     SENSORS_W83781D_IN4                in4:3
               in5                     SENSORS_W83781D_IN5                in5:3
               in6                     SENSORS_W83781D_IN6                in6:3
           in0_min                 SENSORS_W83781D_IN0_MIN                in0:1
           in1_min                 SENSORS_W83781D_IN1_MIN                in1:1
           in2_min                 SENSORS_W83781D_IN2_MIN                in2:1
           in3_min                 SENSORS_W83781D_IN3_MIN                in3:1
           in4_min                 SENSORS_W83781D_IN4_MIN                in4:1
           in5_min                 SENSORS_W83781D_IN5_MIN                in5:1
           in6_min                 SENSORS_W83781D_IN6_MIN                in6:1
           in0_max                 SENSORS_W83781D_IN0_MAX                in0:2
           in1_max                 SENSORS_W83781D_IN1_MAX                in1:2
           in2_max                 SENSORS_W83781D_IN2_MAX                in2:2
           in3_max                 SENSORS_W83781D_IN3_MAX                in3:2
           in4_max                 SENSORS_W83781D_IN4_MAX                in4:2
           in5_max                 SENSORS_W83781D_IN5_MAX                in5:2
           in6_max                 SENSORS_W83781D_IN6_MAX                in6:2
              fan1                    SENSORS_W83781D_FAN1               fan1:2
              fan2                    SENSORS_W83781D_FAN2               fan2:2
              fan3                    SENSORS_W83781D_FAN3               fan3:2
          fan1_min                SENSORS_W83781D_FAN1_MIN               fan1:1
          fan2_min                SENSORS_W83781D_FAN2_MIN               fan2:1
          fan3_min                SENSORS_W83781D_FAN3_MIN               fan3:1
             temp1                   SENSORS_W83781D_TEMP1              temp1:3
        temp1_hyst              SENSORS_W83781D_TEMP1_HYST              temp1:2
        temp1_over              SENSORS_W83781D_TEMP1_OVER              temp1:1
             temp2                   SENSORS_W83781D_TEMP2              temp2:3
        temp2_hyst              SENSORS_W83781D_TEMP2_HYST              temp2:2
        temp2_over              SENSORS_W83781D_TEMP2_OVER              temp2:1
             temp3                   SENSORS_W83781D_TEMP3              temp3:3
        temp3_hyst              SENSORS_W83781D_TEMP3_HYST              temp3:2
        temp3_over              SENSORS_W83781D_TEMP3_OVER              temp3:1
               vid                     SENSORS_W83781D_VID                vid:1
          fan1_div                SENSORS_W83781D_FAN1_DIV            fan_div:1
          fan2_div                SENSORS_W83781D_FAN2_DIV            fan_div:2
          fan3_div                SENSORS_W83781D_FAN3_DIV            fan_div:3
            alarms                  SENSORS_W83781D_ALARMS             alarms:1
       beep_enable             SENSORS_W83781D_BEEP_ENABLE               beep:1
             beeps                   SENSORS_W83781D_BEEPS               beep:2


Chip `w83782d'
             LABEL        LABEL CLASS      COMPUTE CLASS ACCESS MAGNITUDE
               in0               NONE               NONE     R     2
               in1               NONE               NONE     R     2
               in2               NONE               NONE     R     2
               in3               NONE               NONE     R     2
               in4               NONE               NONE     R     2
               in5               NONE               NONE     R     2
               in6               NONE               NONE     R     2
               in7               NONE               NONE     R     2
               in8               NONE               NONE     R     2
           in0_min                in0                in0     RW    2
           in1_min                in1                in1     RW    2
           in2_min                in2                in2     RW    2
           in3_min                in3                in3     RW    2
           in4_min                in4                in4     RW    2
           in5_min                in5                in5     RW    2
           in6_min                in6                in6     RW    2
           in7_min                in7                in7     RW    2
           in8_min                in8                in8     RW    2
           in0_max                in0                in0     RW    2
           in1_max                in1                in1     RW    2
           in2_max                in2                in2     RW    2
           in3_max                in3                in3     RW    2
           in4_max                in4                in4     RW    2
           in5_max                in5                in5     RW    2
           in6_max                in6                in6     RW    2
           in7_max                in7                in7     RW    2
           in8_max                in8                in8     RW    2
              fan1               NONE               NONE     R     0
              fan2               NONE               NONE     R     0
              fan3               NONE               NONE     R     0
          fan1_min               fan1               NONE     RW    0
          fan2_min               fan2               NONE     RW    0
          fan3_min               fan3               NONE     RW    0
             temp1               NONE               NONE     R     1
        temp1_hyst              temp1              temp1     RW    1
        temp1_over              temp1              temp1     RW    1
             temp2               NONE               NONE     R     1
        temp2_hyst              temp2              temp2     RW    1
        temp2_over              temp2              temp2     RW    1
             temp3               NONE               NONE     R     1
        temp3_hyst              temp3              temp3     RW    1
        temp3_over              temp3              temp3     RW    1
               vid               NONE               NONE     R     2
          fan1_div               fan1               NONE     RW    0
          fan2_div               fan2               NONE     RW    0
          fan3_div               fan3               NONE     R     0
            alarms               NONE               NONE     R     0
       beep_enable             alarms               NONE     RW    0
             beeps             alarms             alarms     RW    0
           sensor1               NONE               NONE     RW    0
           sensor2               NONE               NONE     RW    0
           sensor3               NONE               NONE     RW    0

             LABEL                          FEATURE SYMBOL        SYSCTL FILE:NR
               in0                     SENSORS_W83782D_IN0                in0:3
               in1                     SENSORS_W83782D_IN1                in1:3
               in2                     SENSORS_W83782D_IN2                in2:3
               in3                     SENSORS_W83782D_IN3                in3:3
               in4                     SENSORS_W83782D_IN4                in4:3
               in5                     SENSORS_W83782D_IN5                in5:3
               in6                     SENSORS_W83782D_IN6                in6:3
               in7                     SENSORS_W83782D_IN7                in7:3
               in8                     SENSORS_W83782D_IN8                in8:3
           in0_min                 SENSORS_W83782D_IN0_MIN                in0:1
           in1_min                 SENSORS_W83782D_IN1_MIN                in1:1
           in2_min                 SENSORS_W83782D_IN2_MIN                in2:1
           in3_min                 SENSORS_W83782D_IN3_MIN                in3:1
           in4_min                 SENSORS_W83782D_IN4_MIN                in4:1
           in5_min                 SENSORS_W83782D_IN5_MIN                in5:1
           in6_min                 SENSORS_W83782D_IN6_MIN                in6:1
           in7_min                 SENSORS_W83782D_IN7_MIN                in7:1
           in8_min                 SENSORS_W83782D_IN8_MIN                in8:1
           in0_max                 SENSORS_W83782D_IN0_MAX                in0:2
           in1_max                 SENSORS_W83782D_IN1_MAX                in1:2
           in2_max                 SENSORS_W83782D_IN2_MAX                in2:2
           in3_max                 SENSORS_W83782D_IN3_MAX                in3:2
           in4_max                 SENSORS_W83782D_IN4_MAX                in4:2
           in5_max                 SENSORS_W83782D_IN5_MAX                in5:2
           in6_max                 SENSORS_W83782D_IN6_MAX                in6:2
           in7_max                 SENSORS_W83782D_IN7_MAX                in7:2
           in8_max                 SENSORS_W83782D_IN8_MAX                in8:2
              fan1                    SENSORS_W83782D_FAN1               fan1:2
              fan2                    SENSORS_W83782D_FAN2               fan2:2
              fan3                    SENSORS_W83781D_FAN3               fan3:2
          fan1_min                SENSORS_W83782D_FAN1_MIN               fan1:1
          fan2_min                SENSORS_W83782D_FAN2_MIN               fan2:1
          fan3_min                SENSORS_W83781D_FAN3_MIN               fan3:1
             temp1                   SENSORS_W83782D_TEMP1              temp1:3
        temp1_hyst              SENSORS_W83782D_TEMP1_HYST              temp1:2
        temp1_over              SENSORS_W83782D_TEMP1_OVER              temp1:1
             temp2                   SENSORS_W83782D_TEMP2              temp2:3
        temp2_hyst              SENSORS_W83782D_TEMP2_HYST              temp2:2
        temp2_over              SENSORS_W83782D_TEMP2_OVER              temp2:1
             temp3                   SENSORS_W83782D_TEMP3              temp3:3
        temp3_hyst              SENSORS_W83782D_TEMP3_HYST              temp3:2
        temp3_over              SENSORS_W83782D_TEMP3_OVER              temp3:1
               vid                     SENSORS_W83782D_VID                vid:1
          fan1_div                SENSORS_W83782D_FAN1_DIV            fan_div:1
          fan2_div                SENSORS_W83782D_FAN2_DIV            fan_div:2
          fan3_div                SENSORS_W83781D_FAN3_DIV            fan_div:3
            alarms                  SENSORS_W83782D_ALARMS             alarms:1
       beep_enable             SENSORS_W83782D_BEEP_ENABLE               beep:1
             beeps                   SENSORS_W83782D_BEEPS               beep:2
           sensor1                   SENSORS_W83782D_SENS1            sensor1:1
           sensor2                   SENSORS_W83782D_SENS2            sensor2:1
           sensor3                   SENSORS_W83782D_SENS3            sensor3:1


Chip `w83783s'
             LABEL        LABEL CLASS      COMPUTE CLASS ACCESS MAGNITUDE
               in0               NONE               NONE     R     2
               in1               NONE               NONE     R     2
               in2               NONE               NONE     R     2
               in3               NONE               NONE     R     2
               in4               NONE               NONE     R     2
               in5               NONE               NONE     R     2
               in6               NONE               NONE     R     2
           in0_min                in0                in0     RW    2
           in1_min                in1                in1     RW    2
           in2_min                in2                in2     RW    2
           in3_min                in3                in3     RW    2
           in4_min                in4                in4     RW    2
           in5_min                in5                in5     RW    2
           in6_min                in6                in6     RW    2
           in0_max                in0                in0     RW    2
           in1_max                in1                in1     RW    2
           in2_max                in2                in2     RW    2
           in3_max                in3                in3     RW    2
           in4_max                in4                in4     RW    2
           in5_max                in5                in5     RW    2
           in6_max                in6                in6     RW    2
              fan1               NONE               NONE     R     0
              fan2               NONE               NONE     R     0
              fan3               NONE               NONE     R     0
          fan1_min               fan1               NONE     RW    0
          fan2_min               fan2               NONE     RW    0
          fan3_min               fan3               NONE     RW    0
             temp1               NONE               NONE     R     1
        temp1_hyst              temp1              temp1     RW    1
        temp1_over              temp1              temp1     RW    1
             temp2               NONE               NONE     R     1
        temp2_hyst              temp2              temp2     RW    1
        temp2_over              temp2              temp2     RW    1
               vid               NONE               NONE     R     2
          fan1_div               fan1               NONE     RW    0
          fan2_div               fan2               NONE     RW    0
          fan3_div               fan3               NONE     R     0
            alarms               NONE               NONE     R     0
       beep_enable             alarms               NONE     RW    0
             beeps             alarms             alarms     RW    0
           sensor1               NONE               NONE     RW    0
           sensor2               NONE               NONE     RW    0

             LABEL                          FEATURE SYMBOL        SYSCTL FILE:NR
               in0                     SENSORS_W83783S_IN0                in0:3
               in1                     SENSORS_W83783S_IN1                in1:3
               in2                     SENSORS_W83783S_IN2                in2:3
               in3                     SENSORS_W83783S_IN3                in3:3
               in4                     SENSORS_W83783S_IN4                in4:3
               in5                     SENSORS_W83783S_IN5                in5:3
               in6                     SENSORS_W83783S_IN6                in6:3
           in0_min                 SENSORS_W83783S_IN0_MIN                in0:1
           in1_min                 SENSORS_W83783S_IN1_MIN                in1:1
           in2_min                 SENSORS_W83783S_IN2_MIN                in2:1
           in3_min                 SENSORS_W83783S_IN3_MIN                in3:1
           in4_min                 SENSORS_W83783S_IN4_MIN                in4:1
           in5_min                 SENSORS_W83783S_IN5_MIN                in5:1
           in6_min                 SENSORS_W83783S_IN6_MIN                in6:1
           in0_max                 SENSORS_W83783S_IN0_MAX                in0:2
           in1_max                 SENSORS_W83783S_IN1_MAX                in1:2
           in2_max                 SENSORS_W83783S_IN2_MAX                in2:2
           in3_max                 SENSORS_W83783S_IN3_MAX                in3:2
           in4_max                 SENSORS_W83783S_IN4_MAX                in4:2
           in5_max                 SENSORS_W83783S_IN5_MAX                in5:2
           in6_max                 SENSORS_W83783S_IN6_MAX                in6:2
              fan1                    SENSORS_W83783S_FAN1               fan1:2
              fan2                    SENSORS_W83783S_FAN2               fan2:2
              fan3                    SENSORS_W83783S_FAN3               fan3:2
          fan1_min                SENSORS_W83783S_FAN1_MIN               fan1:1
          fan2_min                SENSORS_W83783S_FAN2_MIN               fan2:1
          fan3_min                SENSORS_W83783S_FAN3_MIN               fan3:1
             temp1                   SENSORS_W83783S_TEMP1              temp1:3
        temp1_hyst              SENSORS_W83783S_TEMP1_HYST              temp1:2
        temp1_over              SENSORS_W83783S_TEMP1_OVER              temp1:1
             temp2                   SENSORS_W83783S_TEMP2              temp2:3
        temp2_hyst              SENSORS_W83783S_TEMP2_HYST              temp2:2
        temp2_over              SENSORS_W83783S_TEMP2_OVER              temp2:1
               vid                     SENSORS_W83783S_VID                vid:1
          fan1_div                SENSORS_W83783S_FAN1_DIV            fan_div:1
          fan2_div                SENSORS_W83783S_FAN2_DIV            fan_div:2
          fan3_div                SENSORS_W83783S_FAN3_DIV            fan_div:3
            alarms                  SENSORS_W83783S_ALARMS             alarms:1
       beep_enable             SENSORS_W83783S_BEEP_ENABLE               beep:1
             beeps                   SENSORS_W83783S_BEEPS               beep:2
           sensor1                   SENSORS_W83783S_SENS1            sensor1:1
           sensor2                   SENSORS_W83783S_SENS2            sensor2:1



Miscellaneous documentation
===========================



/PROC ENTRIES
-------------
Varies depending on chip type. Most are identical to the lm78 entries.
See the lm78 documentation for details.

Additional entries not in the lm78:

	pwm[1-4]: (not on w83781d nor as99127f)
	  Controls the speed of the fans with PWM (Pulse Width Modulation)
	  Valid values:
	    0 - 255. 255 = max speed.
        Second value is PWM enable 0/1.

	sensor[1-3]: (not on w83781d nor as99127f)
	  Controls the sensor type. To change to a different
	  sensor type, for example, do 'echo 2 > sensor1'.
	  Valid values:
	       1: Pentium II / Celeron diode
	       2: 2N3904 Transistor in a diode configuration
	    3435: Thermistor with Beta = 3435. Beta is a measure
	          of sensitivity to temperature.
	  Thermistors with other Betas could in theory be supported
	  after correspondence with Winbond. See below.

	rt[1-3]: (w83781d only)
	  32-byte tables controlling the conversion from
	  resistance to temperature for thermistors.
	  For the curious only. Writing to these entries will
	  probably render temperature sensing insane.
	  Only set at initialization; not updated every 1.5 seconds.



TO DO:
-----
 782d programmable pins


NOTES:
-----
  783s has no in1 so that in[2-6] are compatible with the 781d/782d.

  783s pin is programmable for -5V or temp1; defaults to -5V,
       no control in driver so temp1 doesn't work.

  782d and 783s datasheets differ on which is pwm1 and which is pwm2.
       We chose to follow 782d.

  782d and 783s pin is programmable for fan3 input or pwm2 output;
       defaults to fan3 input.
       If pwm2 is enabled (with echo 255 1 > pwm2), then
       fan3 will report 0.

  782d has pwm1-2 for isa, pwm1-4 for i2c. (pwm3-4 share pins with
       the isa pins)



Data sheet updates:
------------------
	- PWM clock registers:

		000: master /  512
		001: master / 1024
		010: master / 2048
		011: master / 4096
		100: master / 8192


Answers from Winbond tech support
---------------------------------
> 
> 1) In the W83781D data sheet section 7.2 last paragraph, it talks about
>    reprogramming the R-T table if the Beta of the thermistor is not
>    3435K. The R-T table is described briefly in section 8.20.
>    What formulas do I use to program a new R-T table for a given Beta?
> 
	We are sorry that the calculation for R-T table value is
confidential. If you have another Beta value of thermistor, we can help
to calculate the R-T table for you. But you should give us real R-T
Table which can be gotten by thermistor vendor. Therefore we will calculate
them and obtain 32-byte data, and you can fill the 32-byte data to the
register in Bank0.CR51 of W83781D.


> 2) In the W83782D data sheet, it mentions that pins 38, 39, and 40 are 
>    programmable to be either thermistor or Pentium II diode inputs. 
>    How do I program them for diode inputs? I can't find any register
>    to program these to be diode inputs.
 --> You may program Bank0 CR[5Dh] and CR[59h] registers.
 
 	CR[5Dh]    		bit 1(VTIN1)    bit 2(VTIN2)   bit 3(VTIN3)
 	      
      	thermistor                0		 0		0	
 	diode 		          1		 1		1		
 
 
(error) CR[59h] 		bit 4(VTIN1)	bit 2(VTIN2)   bit 3(VTIN3)
(right) CR[59h] 		bit 4(VTIN1)	bit 5(VTIN2)   bit 6(VTIN3)
 	
 	PII thermal diode         1		 1		1
 	2N3904	diode	          0		 0		0
 
 
Author/Maintainer
-----------------
Original 781D support: Frodo and Phil
782D/783S support added by: Mark D. Studebaker (mdsxyz123@yahoo.com)


Asus Clones
-----------

We have no datasheets for the Asus clones (AS99127F and ASB100 Bach).
Here are some very useful information that were given to us by Alex Van
Kaam about how to detect these chips, and how to read their values. He
also gives advice for another Asus chipset, the Mozart-2 (which we
don't support yet). Thanks Alex!
I reworded some parts and added personal comments.

# Detection:

AS99127F rev.1, AS99127F rev.2 and ASB100:
- I2C address range: 0x29 - 0x2F
- If register 0x58 holds 0x31 then we have an Asus (either ASB100 or
  AS99127F)
- Which one depends on register 0x4F (manufacturer ID):
  0x06 or 0x94: ASB100
  0x12 or 0xC3: AS99127F rev.1
  0x5C or 0xA3: AS99127F rev.2
  Note that 0x5CA3 is Winbond's ID (WEC), which let us think Asus get their
  AS99127F rev.2 direct from Winbond. The other codes mean ATT and DVC,
  respectively. ATT could stand for Asustek something (although it would be
  very badly chosen IMHO), I don't know what DVC could stand for. Maybe
  these codes simply aren't meant to be decoded that way.

Mozart-2:
- I2C address: 0x77
- If register 0x58 holds 0x56 or 0x10 then we have a Mozart-2
- Of the mozart there are 3 types:
  0x58=0x56, 0x4E=0x94, 0x4F=0x36: Asus ASM58 Mozart-2
  0x58=0x56, 0x4E=0x94, 0x4F=0x06: Asus AS2K129R Mozart-2
  0x58=0x10, 0x4E=0x5C, 0x4F=0xA3: Asus ??? Mozart-2
  You can handle all 3 the exact same way :)

# Temperature sensors:

ASB100:
- sensor 1: register 0x27
- sensor 2 & 3 are the 2 LM75's on the SMBus
- sensor 4: register 0x17
Remark: I noticed that on Intel boards sensor 2 is used for the CPU
  and 4 is ignored/stuck, on AMD boards sensor 4 is the CPU and sensor 2 is
  either ignored or a socket temperature.

AS99127F (rev.1 and 2 alike):
- sensor 1: register 0x27
- sensor 2 & 3 are the 2 LM75's on the SMBus
Remark: Register 0x5b is suspected to be temperature type selector. Bit 1
  would control temp1, bit 3 temp2 and bit 5 temp3.

Mozart-2:
- sensor 1: register 0x27
- sensor 2: register 0x13

# Fan sensors:

ASB100, AS99127F (rev.1 and 2 alike):
- 3 fans, identical to the W83781D

Mozart-2:
- 2 fans only, 1350000/rpm/div
- fan 1: register 0x28,  divisor on register 0xA1 (bits 4-5)
- fan 2: register 0x29,  divisor on register 0xA1 (bits 6-7)

# Voltages:

This is where there is a difference between AS99127F rev.1 and 2.
Remark: The difference is similar to the difference between
  W83781D and W83782D.

ASB100:
in0=r(0x20)*0.016
in1=r(0x21)*0.016
in2=r(0x22)*0.016
in3=r(0x23)*0.016*1.68
in4=r(0x24)*0.016*3.8
in5=r(0x25)*(-0.016)*3.97
in6=r(0x26)*(-0.016)*1.666

AS99127F rev.1:
in0=r(0x20)*0.016
in1=r(0x21)*0.016
in2=r(0x22)*0.016
in3=r(0x23)*0.016*1.68
in4=r(0x24)*0.016*3.8
in5=r(0x25)*(-0.016)*3.97
in6=r(0x26)*(-0.016)*1.503

AS99127F rev.2:
in0=r(0x20)*0.016
in1=r(0x21)*0.016
in2=r(0x22)*0.016
in3=r(0x23)*0.016*1.68
in4=r(0x24)*0.016*3.8
in5=(r(0x25)*0.016-3.6)*5.14+3.6
in6=(r(0x26)*0.016-3.6)*3.14+3.6

Mozart-2:
in0=r(0x20)*0.016
in1=255
in2=r(0x22)*0.016
in3=r(0x23)*0.016*1.68
in4=r(0x24)*0.016*4
in5=255
in6=255


# PWM

Additional info about PWM on the AS99127F (may apply to other Asus
chips as well) by Jean Delvare as of 2004-04-09:

AS99127F revision 2 seems to have two PWM registers at 0x59 and 0x5A,
and a temperature sensor type selector at 0x5B (which basically means
that they swapped registers 0x59 and 0x5B when you compare with Winbond
chips).
Revision 1 of the chip also has the temperature sensor type selector at
0x5B, but PWM registers have no effect.

We don't know exactly how the temperature sensor type selection works.
Looks like bits 1-0 are for temp1, bits 3-2 for temp2 and bits 5-4 for
temp3, although it is possible that only the most significant bit matters
each time. So far, values other than 0 always broke the readings.

PWM registers seem to be split in two parts: bit 7 is a mode selector,
while the other bits seem to define a value or threshold.

When bit 7 is clear, bits 6-0 seem to hold a threshold value. If the value
is below a given limit, the fan runs at low speed. If the value is above
the limit, the fan runs at full speed. We have no clue as to what the limit
represents. Note that there seem to be some inertia in this mode, speed
changes may need some time to trigger. Also, an hysteresis mechanism is
suspected since walking through all the values increasingly and then
decreasingly led to slightly different limits.

When bit 7 is set, bits 3-0 seem to hold a threshold value, while bits 6-4
would not be significant. If the value is below a given limit, the fan runs
at full speed, while if it is above the limit it runs at low speed (so this
is the contrary of the other mode, in a way). Here again, we don't know
what the limit is supposed to represent.

One remarkable thing is that the fans would only have two or three
different speeds (transitional states left apart), not a whole range as
you usually get with PWM.

As a conclusion, you can write 0x00 or 0x8F to the PWM registers to make
fans run at low speed, and 0x7F or 0x80 to make them run at full speed.

Please contact us if you can figure out how it is supposed to work. As
long as we don't know more, the w83781d driver doesn't handle PWM on
AS99127F chips at all.

Additional info about PWM on the AS99127F rev.1 by Hector Martin:

I've been fiddling around with the (in)famous 0x59 register and
found out the following values do work as a form of coarse pwm:

0x80 - seems to turn fans off after some time(1-2 minutes)... might be
some form of auto-fan-control based on temp? hmm (Qfan? this mobo is an
old ASUS, it isn't marketed as Qfan. Maybe some beta pre-attempt at Qfan
that was dropped at the BIOS)
0x81 - off
0x82 - slightly "on-ner" than off, but my fans do not get to move. I can
hear the high-pitched PWM sound that motors give off at too-low-pwm.
0x83 - now they do move. Estimate about 70% speed or so.
0x84-0x8f - full on

Changing the high nibble doesn't seem to do much except the high bit
(0x80) must be set for PWM to work, else the current pwm doesn't seem to
change.

My mobo is an ASUS A7V266-E. This behaviour is similar to what I got
with speedfan under Windows, where 0-15% would be off, 15-2x% (can't
remember the exact value) would be 70% and higher would be full on.
